Results 21 to 30 of about 216,068 (211)
, 2016 以淮南后湖非稳沉采煤沉陷区沉积物-水体界面为研究对象,分析该湖未开发区(A区)、水产养殖区(B区)和水生蔬菜种植区(C区)3个功能区上覆水-间隙水-沉积物体系中氮、磷分布及其迁移特征.结果表明,氮、磷在不同水体界面的分布差异较大.其中上覆水中氮、磷浓度表现为A区＞B区＞C区;间隙水中氮、磷分布差异不显著,然而各功能区间隙水的氮、磷浓度明显高于上覆水,氮、磷主要由间隙水向上覆水中移动;沉积物中氮、磷含量以C区最高.后湖采煤沉陷区水体表现出氮污染、磷限制的现象.
Liu Zheng +4 more
semanticscholar +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2010 研究了在先验分布为伽玛分布下,威布尔分布未知参数θ的Bayes区间估计方法,并给出参数的最高后验概率密度区间——HPD区间估计的条件极值解法.最后给出例子,说明该方法的优越性.
LIZhong-hui(李中恢)
doaj +1 more source
巢湖富营养化的历程、空间分布与治理策略(1984-2013年)
, 2015 In the present study,we analyzed the eutrophication process in Lake Chaohu and its correlation with socioeconomic and population development in Hefei city. We also investigated the spatial and temporal distribution characteristics of total nitrogen,total
张民, 孔繁翔
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Wildlife Letters, EarlyView.The edge densities of cropland, developed land, and water bodies (panel a) predict the spatial probability of mammalian predation on wild turkeys (panel b) using Mahalanobis distance factor analysis in Quitman County, Mississippi, United States. The three habitat fragmentation variables are represented by three arrows, respectively.
Guiming Wang +2 more
wiley +1 more source
Exploring Challenges and Opportunities in International Healthcare Partnerships: A Thematic Analysis
World Medical &Health Policy, EarlyView.ABSTRACT In global health collaborations, countries of all development levels may seek international assistance, emphasizing trust and conflict resolution. However, existing frameworks lack sustainability metrics, governance, and evaluation criteria.
Salma Arabi +2 more
wiley +1 more source
, 2013 华南广泛分布有新元古代中期的岩浆岩, 其锆石以低 δ 18 O值为特征. 判断和限定低 δ 18 O岩浆岩分布的空间范围和时间段, 是认识华南新元古代地壳特征的一个重要方面. 根据对文献发表数据的总结分析发现, 华南新元古代岩浆岩中锆石既有低 δ 18 O值也有高 δ 18 O值, 既有正 e Hf ( t )值也有负 e Hf ( t )值.
张少兵, 郑永飞
semanticscholar +1 more source
New method of calculation Boolean difference based on bj map(基于bj图计算逻辑函数布尔差分的新方法)
Zhejiang Daxue xuebao. Lixue ban, 2004 分析了逻辑函数在部分变量取反时的bj图和降维bj图,在此基础上提出了用bj图和降维bj图计算逻辑函数的一阶布尔差分和二阶布尔差分的图形方法.实例表明,该图形方法有直观、简单等特点.它能给出逻辑函数布尔差分的最简与/异或式.
WUGui-chu(吴桂初) +2 more
doaj +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Many studies have focussed on niche differentiation at the population level to explain the coexistence of similar species. However, information on how individual‐level processes across multidimensional niches shape community dynamics and species coexistence, especially ...
Man Si +8 more
wiley +1 more source
Using online reports of seahorse seizures to track their illegal trade
Conservation Biology, EarlyView.Abstract Illegal wildlife trade (IWT) is a persistent and extensive threat to global biodiversity. Hundreds of marine fish species are subject to regulation under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), but it is unclear how much protection species gain from CITES because information on marine fish ...
Sarah J. Foster +3 more
wiley +1 more source